Improvement in paper-making machines



N. KEELY. Paper-Making Machines. N0 141,358, Patentedluly29,1873.

UNrrEn STATES PATENT OFFICE.

NICE KEELY, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO HIMSELF AND WILLIAM P. OUTTERSON, OF AKRON, OHIO.

IMPROVEMENT lN PAPER-MAKING MACHINES.

Specification forming part of Letters Patent No. 141,358, dated July 29, 1873; application filed I April 30, 1873.

To all whom it may concern:

Be it known that I, NICE KEELY, of Philadelphia, Pennsylvania, have invented certain Improvements in Paper-Making Machines, of which the following is a specification:

The object of my invention is to deprive the web of pulp carried by the endless blanket of a paper-machine of much of its superfluous moisture before it reaches the pressure-rollers, by causing the said blanket A to convey the web of pulp over or in contact with a straining-roller, or between two straining-rollers, B B, as shown in the vertical section, Figure l of the accompanying drawing, the water in the pulp, as well as in the blanket, being forced by pressure through the perforated surfaces of the said straining-rollers into the interior of the latter, from whence the water is drained in the manner described hereafter.

The endless blanket A, common to other paper-making machines, passes between the rollers a and a, and thence between the usual wire-gauze cylinder D and a roller, E, hung to arms F, and bearing with considerable force on the gauze cylinder, so that the pulp taken up from the contents of the trough Gr by and adhering to the surface of the said gauze cylinder shall be transferred from the latter to the blanket A, to which .it will adhere in the fbrin of a continuous web.

It is importanttliatthe" superfluous m oist-' ure should be forced from this web of pulp,

as well as from the blanket, as soon as possible after it leaves the roller E, and this is accomplished by causing the blanket and its web of pulp to pass between the strainingrollers B B, above'referred to.

I make the circumference of each roller, by preference, of wire-gauze, as many folds of this material as are necessary being wrapped over the edges of longitudinal ribs 0, forming part of the shaft, the ends of which constitute the journals d (Z of the rollers; the journals of one roller being adapted to suitable fixed bearings in the opposite side frames of the machine, and those of the other roller being adapted to and arranged to be adjustable by set-screws m in guides in the frames, so that one roller can be caused to bear with more or less force against the pulp and blanket passing round the other roller. Between these ribs e e, which I prefer to make of the curved form-best observed in the enlarged sectional view, Fig. 2-channe1s are formed for the reception of the water expressed from the pulp and blanket, and these channels are inclined at the bottom from a central point, :0 00, shown in the sectional view, Fig. 3, down nearly to the journals d d, sothat the water admitted to the channels shall flow in both directions from. the middle of the roller and be discharged into vertical passages f f, situated one near each end of the roller, as clearly shown in Fig. 2. p

I prefer to make the ribs 6 of the curved form represented, so that they will form receptacles, into which the water will at once pass clear of the blanket and pulp at the point where the latter pass between the strainingrollers. After leaving the latter roller the web of 'pulp is conveyed by the blanket A to the usual pressure-rollers h h, on leaving which the web, in a comparatively dry condition, is separated from the blanket. Particles of pulp adhering to the straining-rollers may be removed therefrom by violent jets of water, such as are used to cleanse ordinary gauze cylinders; or revolving brushes may be used to cleanse the surfaces of the straining-rollers.

There may be one or more straining-rollers against which to press the web of pulp; but I prefer the two rollers shown, as better adapted to the accomplishment of the desired result.

I claim 'as my invention 1. The combination, in a paper-making machine, substantially in the manner described, of a straining rolleror rollers with the endless blanket, for the purpose specified.

2. The within described straining -roller, composed of a shaft having longitudinal inclined channels formed by ribs 0, to which is attached the perforated circumference of the roller, as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

NICE KEELY.

Witnesses:

HARRY SMITH, HUBERT Howson. 

